Discharge valve for flushing cisterns



22 1927. J. B. CHRISTIE DISCHARGE VALVE FOR FLUSHING CISTERNS 2 SheeCs-Sheet 1 Filed Nov. 5, 1925 Feb. 22, 1927.

J- B. CHRISTIE DISCHARGE VALVE FOR FLUSHING QISTERNS Filed Nov. 5, 1925 2 Sheets-Sheet 2 open Patented Feb. 22, 1927..

uurrso STATES PAT ear. carries. 1

JOHN BRYCE" CHRISTIE; OF BERKIVIINGHA'M? ENGLZAND':

msoiianenvarvnroR rrnsrrrne crsrERNs] Application filed November 3, 1925, Serial No; 66,536,. and-iiniGa'ieat Britain AHgHStMIQylfiQEz. i

The present'invent'ion has relation to discharge valvesfor flushing cisterns, such as are employed for sanitary purposes, the present invention having for its object to provide such a valve of particularly simple construction and efficient action.

According to the present invention a manually operable discharge valve is adapted to be held in the open position, after its initial manual actuation, during the release of the liquid from the cistern by means of a supporting vane in the valve .chamber or liquid outlet which is held or acted upon by the flow of the liquid and released whensuch flow ceases to allow the valve to close again.

Conveniently the vane is hinged on a horizontal or transverse axis in the liquid conduit or valve chamber through which the liquid is adapted to flow from the cistern,

and said vane is provided with a projection at or about its hinge adapted to support the valve, after its initial manual actuation, by the pressure exerted upon it by the flow of the liquid.v Upon cessation of such flow of liquid the weight of the valve displaces the vane enabling said valve to disengage the projection and close itself. The vane is preferably of concave or cupped formation.

Further, according to the present invention, I provide a manually operable dis charge valve for a flushing cistern adapted to be held in the open position after its initial manual actuation solely by the gravitation or velocity of the liquid during its release, without the aid of a float, and to close itself as for instance by gravitation upon cessation of, or substantial cessation of, the liquid flow.

In order that this invention may be clearly understood and readily carried into practice, reference is had to the appended drawing, upon which Figure l is a sectional elevation illustrating a discharge valve for a flushing cistern constructed according to the presentinvention.

Figure 2 is a further sectional elevation through the valve, the plane of which is at right angles to that shown in Figure 1.

Figure 3 is an-inverted plan view, and

Figure 4 a further sectional elevation illustrating the valve held in the raised or position by the flow or velocity of the liquid.

Ina convenient embodiment of the present invention, a tubular valve chamber a adapted to'be attached to the base of a water cistern or flushing tank 6 is provided with an upwardly extending arm of. A bridge 0 is provided in the valve chamber a and a support cl is secured to the arm a and in apertures or hearings in the parts 0 and (Z a valve stem 6 carrying a valve f is adapted to. slide. The stem may be'provided with two flange parts 6 6 the part 6 being adapted to screw relatively to the other, and between these flange parts a rubber, leather, or other suitable washer constituting the valve f is provided adapted to engage the upper edge of the valve chamber a. Hinged to the lower bridge member 0 within the valve chamber a is the vane g which is .in the nature of a shield-shaped metal plate,

small projection is provided which, when the vane is in its depending position (see Figure 4;), comes beneath the valve stem 6 when the latter is raised, as shown.

The valve f and stem 6 are adapted to be raised manually by any suitable means, such as a lever, press-button, 'or the like. 7

In operation the valve 7 is raised allowing the liquid to rush from the cistern through the valve chamber a. This holds the vane g in a vertical or depending position (see Figure 4) with its projection g beneath the valve stem 6 supporting the valve until such time as the liquid ceases or substantially ceases to flow, when the weight of the valve displaces the vane g on its hinge by means of its projection, following which displacement the valve f is allowed to seat itself, the vane 9 again assuming the position shown in Figure 1.

tion solely by the gravitation of the liquid.

By forming the lower part of the shield g to a concave or outwardly projecting configuration, suflicient pressure is maintained thereon during the flow of liquid to securely hold the valve in the raised'position. The

upstanding tube It may function as anoverflow pipe or an air conduit or both, or it may in M be used in connection with the after service pipe when the valve is used with a syphonic closet.

Vhat I claim as my invention and desire to secure by Letters Patent is:-

In combination with a manually operable discharge valve for a flushing cistern and a valve chamber for said valve, a permanent bridge-member extending across said valve chamber and having its ends detachahly secured to the walls oi said chamber, said bridge member having a central aperture forming a guide for the stern of said valve, and a cupped vane formed with tubular ends hinged to said bridge-member and having a central tongue bent oil from the plane of said vane and forming an abutment adapted to engage the stem of said valve so as to retain said valve in the open position during the flow of the water past said vane. 20

In witness u'hereoi I have hereunto set my hand.

JOHN BRYCE CHRISTIE. 

